One of the intractable problems is AIDS. Members of both Houses received briefings on the issue of microbicides in the European Parliament building last Friday. This is an experimental treatment and it is not guaranteed that it could not at some stage have counterproductive effects because one must achieve such a level of containment of the virus that one is not creating a virus that has immunity to other drugs. That is just one warning on the subject of microbicides. However, the treatment does have promise.